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21世纪是知识经济时代，信息化、网络化已成为现代社会的一个重要特征。在这个新时代里，网络信息与我们息息相关。信息安全是国家安全的重要基础，因为网络信息在国民经济建设、社会发展、国防和科学研究等领域的作用日益重要。实际上，网络的快速普及与发展、客户端软件多媒体化、协同计算、资源共享与开放、远程管理化、电子商务、金融电子化等已成为网络时代必不可少的产物。

21st century is the era of knowledge economy , information technology, network technology has become an important feature of modern society . In this new era, network information closely related to us . Information security is an important basis for national security , because the network information in the national economy , social development, national defense and scientific research in areas such as the increasingly important role . In fact, the rapid popularization and development of the network , the client software multimedia, collaborative computing , resource sharing and openness , remote management , e-commerce , e-finance , etc., have become an essential product of the Internet age . Ensure that the network information security is critical , no network information security it would not push the application of information network . As an international computer network , social , open , personalized features , which provide people with the sharing of resources , but also brought insecurity problems.

网络信息的泄漏、篡改、假冒和重传，黑客入侵，非法访问，计算机犯罪，计算机病毒传播等对网络信息安全已构成重大威胁。时到今日，许多信息而需要通过数据库通过网络来进行查询，网络数据库的重要地位已不言而喻，尤其是网络数据库中的数据安全与否直接关系到人们的利益、企业的利益、社会的稳定甚至国家的安危。

Network information leakage , tampering, counterfeiting and retransmission , hacking , unauthorized access, computer crime , computer virus dissemination of network information security is a major threat . To today when , and need a lot of information through a database query through the network , the network has the important position of the database is self-evident , especially in the network data in the database security is directly related to people's interests , business interests, community stable or even country 's safety. According to statistics, many of our businesses, and even government agencies are using imported database product , these databases back door we do not know whether the product . Several major foreign database management system in the domestic market share of more than 90 percent market share in the domestic database is also less than 10% . Foreign database products do not provide publicly available source code or kernel interface calls , increase the technical difficulty of self- security . Therefore, research and development of database security control technology has important significance.

目前国内对数据库的安全技术的研究总体上比外国落后。而国内的政府、金融等部门对数据库加密软件的需求非常迫切，通过运用外围的加密软件，对数据库中的数据进行加密，可以从根本上保护数据库中数据信息的安全。

At present, the database security technology research in general than foreign behind. The domestic government, finance and other departments of the database encryption software needs very urgent, through the use of encryption software outside of the encrypted data in the database , you can fundamentally protect the data in the database information security. Encryption level from consideration because most large database products are non- open source software, not the database developer support , by modifying the kernel to modify the database management system , strengthen the database encryption approach would be more difficult to achieve . Therefore , some domestic researchers in database management software encryption packages peripheral structure of the database encryption methods to achieve the data protecti本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。